CSW_GEOLOGY.EARTHQUAKE_PT_250K

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?

Title: CSW_GEOLOGY.EARTHQUAKE_PT_250K
Abstract:
This layer is part of the Geological Survey of Canada's earthquake monitoring network. There are some blank fields toward the beginning of the listing, from the time the network was being installed and hence parameters were often unknown. Also, all depths in the table are "fixed" to a depth which is an integer multiple of 5km, according to lowest obtainable residuals and known crustal structure.
The number and magnitude of located events are also dependent on the time recorded, as the magnitude threshold lowered as more stations were installed. The larger, potentially damaging earthquakes, however, were likely recorded from the inception of the network as these events produce waves which reach the entire western network.
Supplemental_Information: Earthquake points
  1. How should this data set be cited?

    Bird, A.L., and Geological Survey of Canada, Unpublished Material, CSW_GEOLOGY.EARTHQUAKE_PT_250K.

    Online Links:

    • Server=SDECSW; Service=csw_sde; User=CSW_GEOLOGY; Version=SDE.DEFAULT

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -170.219048
    East_Bounding_Coordinate: -94.780952
    North_Bounding_Coordinate: 77.056656
    South_Bounding_Coordinate: 53.701551

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2004
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Composite object (3178)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 61.666667
      Standard_Parallel: 68.000000
      Longitude_of_Central_Meridian: -132.500000
      Latitude_of_Projection_Origin: 59.000000
      False_Easting: 500000.000000
      False_Northing: 500000.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.010000
      Ordinates (y-coordinates) are specified to the nearest 0.010000
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    CSW_GEOLOGY.EARTHQUAKE_PT_250K

    DEPTH
    Depth of earthquake in unknown units

    YEAR
    Year the earthquake occurred

    MONTH
    Month (numeric) the earthquake occurred

    DAY
    Day of the month the earthquake occurred

    TIME
    Time earthquake occurred - hours and minutes component

    TIME
    Time earthquake occurred - seconds component

    MAGNITUDE
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    LATITUDE_DD
    Latitude of earthquake in decimal degrees

    LONGITUDE_DD
    Longitude of earthquake in decimal degrees

    EARTHQUAKE_PT_ID
    Magnitude of earthquake

    GEOMETRY

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Yukon Geological Survey
    c/o Olwyn Bruce
    Geological Spatial Data Administrator
    Box 2703 (K-10)
    Whitehorse, Yukon Y1A 2C6
    Canada

    867 393 7186 (voice)
    867 393 6232 (FAX)
    olwyn.bruce@gov.yk.ca

Why was the data set created?

A record of earthquake activity (up to early 2004) in the Yukon Territory intended for use by the general public, exploration community, prospectors and geologists.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Source_Scale_Denominator: 1:250 000

  2. How were the data generated, processed, and modified?

    (process 1 of 2)
    Dataset copied.

    Data sources used in this process:

    • Z:\CSW_data\CSW_Phase2\Metadata\Geol_earthquakes

    (process 2 of 2)
    Metadata imported.

    Data sources used in this process:

    • O:\CSW_data\CSW_Phase2\Metadata\Final\Geol_earthquakes.xml

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

  5. How consistent are the relationships among the observations, including topology?

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: No access constraints.
Use_Constraints:
The Yukon Government disclaims all warranties, representations, and conditions regarding use of this information, including all implied warranties of merchantability and fitness. In particular, the Yukon Government does not guarantee the quality, accuracy, completeness or timeliness of any of the information provided. Users should verify all information before acting on it.

  1. Who distributes the data set? (Distributor 1 of 1)

    Geological Survey of Canada

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    All agencies or parties that obtain and use this data set do so at their own risk. All products derived from this data set are the sole responsibility of the agency or party that created it.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 03-Mar-2008
Metadata author:
Yukon Geological Survey
c/o Olwyn Bruce
Geological Spatial Data Administrator
Box 2703 (K-10)
Whitehorse, Yukon Y1A 2C6
Canada

867 393 7186 (voice)
867 393 6232 (FAX)
olwyn.bruce@gov.yk.ca

Hours_of_Service: 08:30-17:00 PST
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.6 on Thu May 28 13:40:03 2009